Rotary valve for explosive-engines.



D. B. BUBAR.

ROTARY VALVE FOR EXPLOSlV-E ENGINES.

' APPLICATION FILED JULY 3. 1914.

1474 818.v Patented Mar.7,'1916.

2 SHEETS-SHEET I.

jr y 'u/wr WITNESSES S INVENTOR HE COLUMBIA PLANDGRAPH cc.. WASHINGTON,n. c.

D. B. BUBAR. v

ROTARY VALVE FOR EXPLOSIVE ENGINES.

APPLICATION FILED JULY 3| 1914.

Patented Mar. 7, 1916.

2 SHEETS-SHEET 2- WITNESSES engine.

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DEAN

B. rUBAR, or nosEBonG, OREGON;

rice.

ROTARY VALVE FOR EXPLOSIVE-ENGINES.

Specification of Letters Patent.

Patented Mar. '7, 1916.

Application filed July 3, 1914. Serial No. 848,835.

To all whom it may concern:

Be it known that I, DEAN B. BUBAR, a citizen of the United States,residing at Roseburg, in the county of Douglas and State of Oregon, haveinvented certain new and useful Improvements in Rotary. Valves forExplosive-Engines; and I do hereby declare the following to be a full,clear, and

exact description of the invention, such as worm gear driven by asprocket chain connecticn with the crank shaft of the engine, thuseliminating the noise and vibration and furtherdispensing with thenecessity of grinding the valves, for by their constructicn and rotarymotion there are no flat uy.

faces formed upon the valves for the accumulation of carbon that sooften interferes with the eflicient operation of the valves and therebycausing serious loss of the compressed gas, this being exceedinglydetrimental to the smooth running of the A still further object of thisinvention resides/in the provision of independent inlet and exhaustvalves for controlling the respective inlet and exhaust ports of theengine, whereby the alternate excessive heating and extreme chilling ofthe valves, as in the case when a single valve is required to perform adouble function of controlling theinlet and exhaust valves, and thedetrimental results therefrom, are wholly obviated, and sticking of thevalves due to the sudden expansion and contraction alternately at theopposite ends thereof and the damage occasioned thereby are eliminated.And a still further object of this invention resides in the provision ofan independent valve for controlling the respective inlet port andoutlet port of afour cycle internal combustion engine, so driven andtimed that the respective valves make one revolution to two of" thecrank shaft of the engine, thus reducingitheexcessive wear of the valvesand prolonging: the life: of. the. same;

And still an-- other object of this invention resides in the provisionof rotary valves for'control'ling the respective inlet and exhaust portsof a four cycle internal combustion engine, the valves occupyingseparate casings and each provided with packing rings arranged inamanner for providing air tight fittings for the valves for preventingthe escape of gases therearound, the valves, however being of similarconstruction, the only difierence being in the timing of the valves.

These and other objects will more fully appear and the nature of theinvention bemore clearly understood by the construction and thecombination and arrangement of the parts thereof as described in thefollowing specification, defined in the appended claims, and illustratedin the accompanying draw-- ings, in which,

Figure 1 is a vertical sectional view of the engine showing theconstruction and a correlation of the working parts thereof. Fig. 2 is afragmentary horizontal sectional view online 22 of Fig. 1 showing themounting of the inlet and exhaust valves and the respective positionsrelative to each other immediately after the explosion of a fuel charge,the position of the valves va ving slightly from that shown in Fig. 1.Fig.

3 is a detail view of the worm gear and sprocket connections foroperating the respective valves. Fig. 4, is a horizontal sectional viewshowing the manner of positioning the respective inlet'and exhaustvalves diametrically opposite each. other upon the engine cylinder.

Referring to the drawings 1 denotesrthe engine casing having thecylinder Qarranged thereon and upon thecylinder Q'is mounted the head 3secured to the cylinder 2 through the medium of the bolts 4 or othersuitable securing means, and upon one. side of the cylinder 2 and thehead 8, as in Fig. 2 or at opposite sides thereof as in Fig. 4:, areformedthe valve casings 5, the cylinder 2, the head 8, and the valvecasings 5 being provided with the water jacket or. other suitablecylinder cooling means 6, the head 8 of the cylinder 2 being providedwith the spark plug opening 7. Operating within the cylinder 2 isthe'piston 8 provided with I the u) oer and lower oackin rin 's 9 andpivotally connected as at 10 is the pitman rod 11, journaled orotherwise secured as'at 12 to the crank 18 ofthe crank shaft. 11',

within theengine' casingl, the crankshaft ber 32 and having its loweroutlet end 33 1 exhaust port 34 formed in the outer wall of.

one of the valve casings 5. the exhaustvalve gine casing l is anotherjournal similar to 14 being suitably journaled within the engine casing1 in any suitable mann'er,and upon the crank shaft lat-within the enginecasing 1 is suitably secured the sprocket 15 surrounding which is thesprocket chain 16 for connecting the sprocket 17 with the sprocket 15for the operation of the sprocket 17 by the sprocket 15,'the sprocket 17being suitably secured to the worm shaft 18 revolubly mounted within theextension 19 of the engine casing 1, the worm shaft 18 having arrangedthereon the worm 20 and within the upper portion of the extension 19 ofthe engine casing 1 is arranged a suitable journal, 21 provided with thebore 22 through which and revolubly mounted therein is the valve stem 23provided with the bearing collar 2% adjustably secured upon the valvestem 23 by the set screw 25, the bearing collar 24 being capable ofrotation upon the outer bearing surfaces of the journals'21, and uponthe lower end ofthe valve stem 23 within the engine fcasing 1 is securedthe.

mounted in one of the valve casings 5, and

has arranged therethrough the S-shaped bore 29, having its upper inletend 30 adapted to register with the exhaust bore 31 formed in the wallof the combustion chamadaptedrto connectsimultaneously with the 27 isfurther provided with the upper packing ring 35 arranged adjacent theupper end of the exhaust valve 27, and also provided with the packingring-36 arranged upon theexhaust valve 27 at a point approximatelyintermediate of its ends, whereby to provide air tight fittings atpoints above and below the exhaust port 31 for preventing the leakage ofthe spent gases therearound. V V

Formed within the extension 19 of the enthe journal 21 having a boretherethrough similar to the bore 22, and through which bore andrevolubly mounted therein is the inlet valve stem 37 havmg arrangedthereon a bearing collar similar to the collar 24 and adjustably securedto the inlet stem 37 by Y secured thereon through the means of a setscrew similar to the set screw 28 of the exhaust valve 27, and alsohaving formed therethrough the S-shaped bore 40 having its upper outletend 41 adapted to register with the fuel inlet port 42 leading into thecombustion chamber 32 of the head 3, and having its lower inlet end 4-3adapted to register with the fuel intake port 44:, which port isconnected with any desirable fuel V supply means.

In defining the operation of this invention it will be assumed that theengine is of the four cycle type, and in this instance the respectivevalves 27 and 39 are so timed with respect to the engine shaft 1 1through the worm gearing and sprocket connections that the respectivevalves 27 and 39 complete one revolution to each two revolutions of thecrank shaft 1 1, the valve ports 29 and 40 being positioned atapproximately right angular relation to each other or at an angle of 90degrees, whereby upon the crank shaft 1 L being turned slightly past theupper dead center, the inlet valve 39 through its connections with thecrank shaft 1% will be rotated upon its axis until the outlet port 41registers with the inlet port 42, the inlet port 413 of the valve 39simultaneously registering with the intake port 4-1- and upon furthermovement of the piston 8, a supply of fuel mixture is drawn into thecombustion chamber 32, the exhaust valve 27 at this time having beenrotated .for closing the exhaust port 31, and upon the backward strokeof the piston 8 the fuel charge in the combustion chamber 32 is therebycompressed and-the inlet valve 39 at this time has been rotated forcompletely closing the inletport42 and upon the slight further movementof the crank 13 pastthe upper dead center the spark is fired forexploding the mixture, thereby forcing the piston 8 downwardly, both ofthe valves 27 and 39 being positioned as to completely close the ports31 and 4-2. About the time that the piston 8 begins to return from itslowest position the inlet end 30 of the exhaust valve 29 is brought intoregistration with the exhaust port 31, the outlet end 33 of the valve 27being simultaneously in registration with the outer exhaust port 34whereupon the piston upon its further upward movement forces thespentgases out of the combustion chamber 32 through port-29 of the exhaustvalve 27, thus completing the clearance stroke at the fourth cycle ofthe engine,the same being now in the position for a repetition of theoperation as above stated.

By the provision of the wear collars 24 adjustably mounted upon therespective valve stems 23 and 37, the stems are maintained in strictvertical position within their respective journals as well asmaintaining the worm gears 26 in accurate and constant mesh with theworm 20 of the worm shaft 18, and by adjustably mounting the valves 27and 39 upon their respective valve stems 23 and 37 I am enabled toaccurately and efiiciently adjust the valveswith respect to the'variousports for maintaining the accurate and smooth running of the engine.

I desire to here state that while I have shown the valves as applied toan internal combustion engine, it is to be understood that I do notlimit my valve to this specific application, as the same is equally welladapted for use in connection with steam engines, pumps or othermechanisms wherein a valve is a necessary part for its operation.

While I have here shown and described the preferred form of my inventionI hereby reserve the right to make such alterations and variationstherein from time to time as I may deem expedient and which will bewithin the scope of the claims.

l/Vhat I claim as new, and desire to secure by Letters Patent, is I 1.In combination with the cylinder of an explosive engine having an inletport and an exhaust port and a piston, of a valve casing having aninletvalve compartment and an exhaust valve compartment, an inlet portand an exhaust port both of said ports being located below thecooperating ports of the cylinder; two vertically positioned, rotary,cylindrical valves operating in said valve compartment, each ofsaidvalves having a packing-ringadjacent the upper'end thereof and asecond packing-ring adjacent the medial portion of said valve, and avertical opening therethrough for the purpose of establishingcommunication between the ports of said cylinder and the ports of saidvalve casing, the lower end of the said opening through said valve beingbelow'the lower packing-ring, the upper end of the said opening being onthe diametrically opposite face of the valve and located above the saidlower packing ring, said valves being positioned with the saidopenings-at right angles 7 .gine and the cylinder thereof provided withan inlet port and an exhaust port, of a cas- 1ng having an inlet valvecompartment and an exhaust valve compartment and an inlet port and anexhaust port, both of said ports being located below the cooperatingports of the said cylinder; two vertically POSI- tioned, cylindricalrotary valves operating in said Valve compartments, each of said valveshaving a packing-ring adjacent the upper end thereof anda secondpacking-ring adjacent the medial portion of said valve,

and a vertical opening through said valve for establishing communicationbetween the ports of said cylinder and the ports of said valve casing,the lower end of the said open ing through said valve being below thelower packing-ring, the upper end, of the said opening being on thediametrically opposite face of the valve and located above the'saidlower packing-ring, said valves being positioned with the said openingsat right angles to each other, and are adapted for opening and closingthe said ports in said cylinder alternately, together with thecooperating ports of the said valve casing; a worm gear and sprocketconnection between said valves and the crank shaft of the engine forrevolving said valves at a ratio of one to two relaa tive to the saidcrank shaft, and means for adjusting said valves for accurateregistration with said ports.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

DEAN B. BUBAR.

Witnesses:

GEORGE W. YOUNG, ROY O. YOUNG.

Copies of this patent may be obtained for five cents each, by addressingthe "Commissioner 01' Patents, Washington, D. 0.

